DEV Community: Marmot

Stuck while learning ruby on rails

Marmot — Thu, 19 Aug 2021 17:17:01 +0000

Hi all,

I'm learning ruby now and I have this exercise on which I'm stuck but can't figure out why. The picture says it all. I'm supposed to write a loop, it's supposed to end by "end" which it does but I get the error message that a keyword_end is expected.... I tried everything I could think of so now I'm asking help to see what I'm missing.

Take care all and thanks for your help.

Install git on mac through terminal

Marmot — Wed, 03 Jun 2020 10:59:00 +0000

How to cd to a directory with a space in the name?

Marmot — Sun, 24 May 2020 15:52:01 +0000

Hi, I'm trying to navigate my folders using terminal and want to go into a folder called 'Front end'. I googled and found 2 solutions :

-Put quotes around the directory name. (cd ~/"Front end"/)
-Escape the directory name with a backslash (cd ~/Front\ end/)

None of these solutions work for me. Am I missing something?

Thanks for help.

https://dev-to-uploads.s3.amazonaws.com/i/8fksvb5za17363gsjrgh.png

Can someone explain that logic to me?

Marmot — Wed, 06 May 2020 10:36:11 +0000

Hi I'm following a Webdev Course on udemy. As an exercise we had to identify a missing number from an array and so the solution was like this :

var numbers = [4, 8, 9, 12, 19, 7, 3, 15, 2, 17, 20, 1, 11, 5, 10, 13, 16, 14, 18]

function missingno(numbers){

var missing = - 1

for (var i=0; i <= numbers. length; i++){

if(numbers.indexOf(i) === - 
1){
 missing = i
}

}
return missing
}

console.log(missingno(numbers))

I don't understand why the index of the missing numbers is - 1. Is it a rule? or is there a mathematical logic to it? And if so, what would be that logic?

My brain is smoking right now.

If anyone can take the time to explain, it would be greatly appreciated.

Peace!